Unfortunately "luxury" doesn't seem like the likely outcome here. Luxury items are created via artificial scarcity (e.g. diamonds) or just by high cost of exper

Unfortunately "luxury" doesn't seem like the likely outcome here. Luxury items are created via artificial scarcity (e.g. diamonds) or just by high cost of expertise and goods (e.g. a luxury car). In order for food to become a luxury item, it needs to be a more costly variation on something which is more readily available. This allows for a constant demand, with a side business in exotic expensive extras. If coffee, globally, needed to be grown in greenhouses it would just become a novelty tree that school trips visited until the climate turned around and it became an economically viable crop again.